Members of the group, which is run from a Greenwich restaurant, will appear at a debate about polygamy in London tonight. They say they want to show Muslims in Britain that the practice can work. But Sara Khan, director of Muslim women's charity Inspire, said: "Polygamy is illegal under British law and such a club would reduce a woman to a mere prop in a man's life. Not only does it demean women, it is demeaning to men too and the institution of marriage."